curl_easy_getinfo(3)

NAME
curl_easy_getinfo - extract information from a curl handle

SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ...);

DESCRIPTION
Get the info kept in the curl handle. The third argument MUST be pointing to the specific type of the used option which is documented in each man page of the info option. The data is stored accordingly and can be relied upon only if this function returns CURLE_OK. Use this function after a performed transfer if you want to get transfer related data. You should not free the memory returned by this function unless it is explicitly mentioned below.

OPTIONS
The following information can be extracted:

CURLINFO_ACTIVESOCKET
    The session's active socket. See CURLINFO_ACTIVESOCKET(3)

CURLINFO_APPCONNECT_TIME
    The time it took from the start until the SSL connect/handshake with the remote host was completed as a double in number of seconds.

CURLINFO_APPCONNECT_TIME_T
    The time it took from the start until the SSL connect/handshake with the remote host was completed in number of microseconds. (Added in 7.60.0) See CURLINFO_APPCONNECT_TIME_T(3)

CURLINFO_CAINFO
    Get the default value for CURLOPT_CAINFO(3). See CURLINFO_CAINFO(3)

CURLINFO_CAPATH
    Get the default value for CURLOPT_CAPATH(3). See CURLINFO_CAPATH(3)

CURLINFO_CERTINFO
    Certificate chain. See CURLINFO_CERTINFO(3)

CURLINFO_CONDITION_UNMET
    Whether or not a time conditional was met or 304 HTTP response. See CURLINFO_CONDITION_UNMET(3)

CURLINFO_CONNECT_TIME
    The time it took from the start until the connect to the remote host (or proxy) was completed. As a double. See CURLINFO_CONNECT_TIME(3)

CURLINFO_CONNECT_TIME_T
    The time it took from the start until the connect to the remote host (or proxy) was completed. In microseconds. See CURLINFO_CONNECT_TIME_T(3).

CURLINFO_CONN_ID
    The ID of the last connection used by the transfer. (Added in 8.2.0) See CURLINFO_CONN_ID(3)

CURLINFO_CONTENT_LENGTH_DOWNLOAD
    (Deprecated) Content length from the Content-Length header. See CURLINFO_CONTENT_LENGTH_DOWNLOAD(3)

CURLINFO_CONTENT_LENGTH_DOWNLOAD_T
    Content length from the Content-Length header. See CURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3)

CURLINFO_CONTENT_LENGTH_UPLOAD
    (Deprecated) Upload size. See CURLINFO_CONTENT_LENGTH_UPLOAD(3)

CURLINFO_CONTENT_LENGTH_UPLOAD_T
    Upload size. See CURLINFO_CONTENT_LENGTH_UPLOAD_T(3)

CURLINFO_CONTENT_TYPE
    Content type from the Content-Type: header. We recommend using curl_easy_header(3) instead. See CURLINFO_CONTENT_TYPE(3)

CURLINFO_COOKIELIST
    List of all known cookies. See CURLINFO_COOKIELIST(3)

CURLINFO_EARLYDATA_SENT_T
    Amount of TLS early data sent (in number of bytes) when CURLSSLOPT_EARLYDATA is enabled.

CURLINFO_EFFECTIVE_METHOD
    Last used HTTP method. See CURLINFO_EFFECTIVE_METHOD(3)

CURLINFO_EFFECTIVE_URL
    Last used URL. See CURLINFO_EFFECTIVE_URL(3)

CURLINFO_FILETIME
    Remote time of the retrieved document. See CURLINFO_FILETIME(3)

CURLINFO_FILETIME_T
    Remote time of the retrieved document. See CURLINFO_FILETIME_T(3)

CURLINFO_FTP_ENTRY_PATH
    The entry path after logging in to an FTP server. See CURLINFO_FTP_ENTRY_PATH(3)

CURLINFO_HEADER_SIZE
    Number of bytes of all headers received. See CURLINFO_HEADER_SIZE(3)

CURLINFO_HTTPAUTH_AVAIL
    Available HTTP authentication methods. See CURLINFO_HTTPAUTH_AVAIL(3)

CURLINFO_HTTPAUTH_USED
    Used HTTP authentication method. See CURLINFO_HTTPAUTH_USED(3)

CURLINFO_HTTP_CONNECTCODE
    Last proxy CONNECT response code. See CURLINFO_HTTP_CONNECTCODE(3)

CURLINFO_HTTP_VERSION
    The http version used in the connection. See CURLINFO_HTTP_VERSION(3)

CURLINFO_LASTSOCKET
    (Deprecated) Last socket used. See CURLINFO_LASTSOCKET(3)

CURLINFO_LOCAL_IP
    Source IP address of the last connection. See CURLINFO_LOCAL_IP(3)

CURLINFO_LOCAL_PORT
    Source port number of the last connection. See CURLINFO_LOCAL_PORT(3)

CURLINFO_NAMELOOKUP_TIME
    Time from start until name resolving completed as a double. See CURLINFO_NAMELOOKUP_TIME(3)

CURLINFO_NAMELOOKUP_TIME_T
    Time from start until name resolving completed in number of microseconds. See CURLINFO_NAMELOOKUP_TIME_T(3)

CURLINFO_NUM_CONNECTS
    Number of new successful connections used for previous transfer. See CURLINFO_NUM_CONNECTS(3)

CURLINFO_OS_ERRNO
    The errno from the last failure to connect. See CURLINFO_OS_ERRNO(3)

CURLINFO_POSTTRANSFER_TIME_T
    The time it took from the start until the last byte is sent by libcurl. In microseconds. (Added in 8.10.0) See CURLINFO_POSTTRANSFER_TIME_T(3)

CURLINFO_PRETRANSFER_TIME
    The time it took from the start until the file transfer is about to begin. This includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. See CURLINFO_PRETRANSFER_TIME(3)

CURLINFO_PRETRANSFER_TIME_T
    The time it took from the start until the file transfer is about to begin. This includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. In microseconds. See CURLINFO_PRETRANSFER_TIME_T(3)

CURLINFO_PRIMARY_IP
    Destination IP address of the last connection. See CURLINFO_PRIMARY_IP(3)

CURLINFO_PRIMARY_PORT
    Destination port of the last connection. See CURLINFO_PRIMARY_PORT(3)

CURLINFO_PRIVATE
    User's private data pointer. See CURLINFO_PRIVATE(3)

CURLINFO_PROTOCOL
    (Deprecated) The protocol used for the connection. See CURLINFO_PROTOCOL(3)

CURLINFO_PROXYAUTH_AVAIL
    Available HTTP proxy authentication methods. See CURLINFO_PROXYAUTH_AVAIL(3)

CURLINFO_PROXYAUTH_USED
    Used HTTP proxy authentication methods. See CURLINFO_PROXYAUTH_USED(3)

CURLINFO_PROXY_ERROR
    Detailed proxy error. See CURLINFO_PROXY_ERROR(3)

CURLINFO_PROXY_SSL_VERIFYRESULT
    Proxy certificate verification result. See CURLINFO_PROXY_SSL_VERIFYRESULT(3)

CURLINFO_QUEUE_TIME_T
    The time during which the transfer was held in a waiting queue before it could start for real in number of microseconds. (Added in 8.6.0) See CURLINFO_QUEUE_TIME_T(3)

CURLINFO_REDIRECT_COUNT
    Total number of redirects that were followed. See CURLINFO_REDIRECT_COUNT(3)

CURLINFO_REDIRECT_TIME
    The time it took for all redirection steps include name lookup, connect, pretransfer and transfer before final transaction was started. This is zero if no redirection took place. As a double. See CURLINFO_REDIRECT_TIME(3)

CURLINFO_REDIRECT_TIME_T
    The time it took for all redirection steps include name lookup, connect, pretransfer and transfer before final transaction was started. This is zero if no redirection took place. In number of microseconds. See CURLINFO_REDIRECT_TIME_T(3)

CURLINFO_REDIRECT_URL
    URL a redirect would take you to, had you enabled redirects. See CURLINFO_REDIRECT_URL(3)

CURLINFO_REFERER
    Referrer header. See CURLINFO_REFERER(3)

CURLINFO_REQUEST_SIZE
    Number of bytes sent in the issued HTTP requests. See CURLINFO_REQUEST_SIZE(3)

CURLINFO_RESPONSE_CODE
    Last received response code. See CURLINFO_RESPONSE_CODE(3)

CURLINFO_RETRY_AFTER
    The value from the Retry-After header. See CURLINFO_RETRY_AFTER(3)

CURLINFO_RTSP_CLIENT_CSEQ
    The RTSP client CSeq that is expected next. See CURLINFO_RTSP_CLIENT_CSEQ(3)

CURLINFO_RTSP_CSEQ_RECV
    RTSP CSeq last received. See CURLINFO_RTSP_CSEQ_RECV(3)

CURLINFO_RTSP_SERVER_CSEQ
    The RTSP server CSeq that is expected next. See CURLINFO_RTSP_SERVER_CSEQ(3)

CURLINFO_RTSP_SESSION_ID
    RTSP session ID. See CURLINFO_RTSP_SESSION_ID(3)

CURLINFO_SCHEME
    The scheme used for the connection. See CURLINFO_SCHEME(3)

CURLINFO_SIZE_DOWNLOAD
    (Deprecated) Number of bytes downloaded. See CURLINFO_SIZE_DOWNLOAD(3)

CURLINFO_SIZE_DOWNLOAD_T
    Number of bytes downloaded. See CURLINFO_SIZE_DOWNLOAD_T(3)

CURLINFO_SIZE_UPLOAD
    (Deprecated) Number of bytes uploaded. See CURLINFO_SIZE_UPLOAD(3)

CURLINFO_SIZE_UPLOAD_T
    Number of bytes uploaded. See CURLINFO_SIZE_UPLOAD_T(3)

CURLINFO_SPEED_DOWNLOAD
    (Deprecated) Average download speed. See CURLINFO_SPEED_DOWNLOAD(3)

CURLINFO_SPEED_DOWNLOAD_T
    Average download speed. See CURLINFO_SPEED_DOWNLOAD_T(3)

CURLINFO_SPEED_UPLOAD
    (Deprecated) Average upload speed. See CURLINFO_SPEED_UPLOAD(3)

CURLINFO_SPEED_UPLOAD_T
    Average upload speed in number of bytes per second. See CURLINFO_SPEED_UPLOAD_T(3)

CURLINFO_SSL_ENGINES
    A list of OpenSSL crypto engines. See CURLINFO_SSL_ENGINES(3)

CURLINFO_SSL_VERIFYRESULT
    Certificate verification result. See CURLINFO_SSL_VERIFYRESULT(3)

CURLINFO_STARTTRANSFER_TIME
    The time it took from the start until the first byte is received by libcurl. As a double. See CURLINFO_STARTTRANSFER_TIME(3)

CURLINFO_STARTTRANSFER_TIME_T
    The time it took from the start until the first byte is received by libcurl. In microseconds. See CURLINFO_STARTTRANSFER_TIME_T(3)

CURLINFO_TLS_SESSION
    (Deprecated) TLS session info that can be used for further processing. See CURLINFO_TLS_SESSION(3). Use CURLINFO_TLS_SSL_PTR(3) instead.

CURLINFO_TLS_SSL_PTR
    TLS session info that can be used for further processing. See CURLINFO_TLS_SSL_PTR(3)

CURLINFO_TOTAL_TIME
    Total time of previous transfer. See CURLINFO_TOTAL_TIME(3)

CURLINFO_TOTAL_TIME_T
    Total time of previous transfer. See CURLINFO_TOTAL_TIME_T(3)

CURLINFO_USED_PROXY
    Whether the proxy was used (Added in 8.7.0). See CURLINFO_USED_PROXY(3)

CURLINFO_XFER_ID
    The ID of the transfer. (Added in 8.2.0) See CURLINFO_XFER_ID(3)

TIMES
An overview of the time values available from curl_easy_getinfo(3)
curl_easy_perform()
    |
    |--QUEUE
    |--|--NAMELOOKUP
    |--|--|--CONNECT
    |--|--|--|--APPCONNECT
    |--|--|--|--|--PRETRANSFER
    |--|--|--|--|--|--POSTTRANSFER
    |--|--|--|--|--|--|--STARTTRANSFER
    |--|--|--|--|--|--|--|--TOTAL
    |--|--|--|--|--|--|--|--REDIRECT
CURLINFO_QUEUE_TIME_T(3), CURLINFO_NAMELOOKUP_TIME_T(3), CURLINFO_CONNECT_TIME_T(3), CURLINFO_APPCONNECT_TIME_T(3), CURLINFO_PRETRANSFER_TIME_T(3), CURLINFO_POSTTRANSFER_TIME_T(3), CURLINFO_STARTTRANSFER_TIME_T(3), CURLINFO_TOTAL_TIME_T(3), CURLINFO_REDIRECT_TIME_T(3)

PROTOCOLS
This functionality affects all supported protocols

EXAMPLE
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
    result = curl_easy_perform(curl);
    if(result == CURLE_OK) {
      char *ct;
      /* ask for the content-type */
      result = curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ct);
      if((result == CURLE_OK) && ct)
        printf("We received Content-Type: %s\n", ct);
    }
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
}

AVAILABILITY
Added in curl 7.4.1

RETURN VALUE
This function returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). If CURLOPT_ERRORBUFFER(3) was set with curl_easy_setopt(3) there can be an error message stored in the error buffer when non-zero is returned.

SEE ALSO
curl_easy_setopt(3)